Such a great game! When I bought this, it was an 18 (I wasn't... shhh) but you can totally see how times have changed! Good fun just for zapping people with tesla coils.
Back in the day, EA released Red Alert free to download to encourage people to buy Red Alert 3.
This link is the best one i could find to provide official mirrors to download Red Alert - you can download the Allied and Soviet discs using the download links. Each file is 500mb. Really wanted to find the official press-release to back this up, maybe somebody else can?
• EA.com (Europe Mirror) - Allied Disc
• EA.com (Europe Mirror) - Soviet Disc